A185488 Number of (n+1)X(n+1) binary arrays with every 2X2 subblock sum equal to some horizontal or vertical neighbor 2X2 subblock sum

0, 128, 5936, 1020072, 512228678, 835833221744

Offset

1,2

Comments

Diagonal of A185497

Links

Table of n, a(n) for n=1..6.

Example

Some solutions for 4X4
..0..1..1..1....0..0..0..0....1..0..0..1....1..0..0..0....1..1..1..1
..0..1..1..1....1..1..1..1....0..0..1..1....0..1..1..1....1..0..0..0
..1..0..1..0....0..0..0..0....1..1..1..0....1..1..0..1....1..1..1..1
..1..0..1..0....1..1..0..1....0..0..1..1....0..1..0..1....0..1..0..1

Crossrefs

Sequence in context: A240931 A282527 A297093 * A283690 A008791 A201239

Adjacent sequences: A185485 A185486 A185487 * A185489 A185490 A185491

Keyword

nonn

Author

R. H. Hardin Jan 29 2011

Status

approved